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Gas Safe Registered Engineers

Boiler Installation in East Sussex

New boiler supply and installation with up to a 12-year guarantee serving homeowners across East Sussex.

Gas Safe Registered1,000+ Installed36+ Years Experience12-Year Guarantee
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Gas Safe Registered

Reg No. 575142 — fully certified engineers

Finance options available

New Boiler Installation

Local Boiler Installers.
Trusted Across East Sussex.

We're a Gas Safe registered team with over 36 years of experience installing boilers for homeowners across East Sussex from Brighton and Eastbourne to Hastings, Lewes, and the villages in between.

Our engineers show up on time, work with care, and won't leave until you're completely comfortable with your new system.

Fitted and forgotten isn't how we work.

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Worcester Bosch boiler installation

Warning Signs

Is It Time for a New Boiler?

Watch for these signs:

  • Boiler is 10 years old or more
  • Repairs needed more than once a year
  • Energy bills quietly climbing
  • Banging, gurgling, or kettling sounds
  • Pilot light burning yellow or orange
  • Some rooms warm, others cold
  • Moisture or dampness near the unit

Catching these early gives you time to plan — and almost always saves money compared to waiting for a breakdown.

Book a Free Survey

Efficiency comparison

Old boiler (G-rated)~60% efficient
New A-rated boiler≥92% efficient

Potential annual savings: up to £490

Boiler Types

Which Boiler Do You Need?

Combi boiler system diagram

Combi Boiler

The most popular choice for smaller homes and flats. Heats water on demand, delivers hot water whenever you need it, and fits neatly into compact spaces. Efficient, reliable, and widely trusted across East Sussex.

Regular boiler system diagram

Regular / Heat-Only Boiler

The natural replacement for homes with traditional setup tanks, cylinder, older radiator systems. Like-for-like compatibility, installed properly.

System boiler system diagram

System Boiler

Built for busier households. Multiple bathrooms, high daily demand, a system boiler keeps hot water pressure consistent throughout. Works alongside a hot water cylinder.

Not sure which suits your home? Our engineer will assess everything during your free survey and give you a straight, honest recommendation.

Why Upgrade?

The benefits of upgrading to a new energy-efficient boiler

Older boilers can run at just 60% efficiency. That's nearly half your energy bill going nowhere.

Today's A-rated boilers regularly hit over 90%. The difference shows up fast on your bills, in your comfort, and in how quietly everything runs.

A new boiler brings:

  • Lower energy bills — from the first month
  • Quieter, more reliable heating — warmth that works in the background
  • Smart thermostat compatibility — control your home from your phone
  • Reduced carbon output — a greener home, year-round
  • Added property value — something buyers genuinely look for
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How It Works

How It Works

Over 1,000 boilers were installed across East Sussex. The process is simple.

01

Free Survey & Quote

We visit, assess your system, and recommend the right boiler for your home, lifestyle, and budget. Clearly. Honestly.

02

Choose Your Boiler

We walk you through your options in plain language. No pressure. Your decision, made with confidence.

03

Installation

Same-day and next-day slots available. Professional, careful, and respectful of your home throughout.

04

Handover & Aftercare

We walk you through everything before we leave. Questions later? We’re still here. Your guarantee runs long after we’re gone.

Spread the Cost

Every East Sussex homeowner deserves a quality heating system regardless of budget.

We offer flexible finance so you can spread the cost into manageable monthly payments. Same boiler, same installation, at a pace that works for you.

Explore Finance Options
Boiler Finance Options

FAQs

Frequently Asked Questions

Everything you need to know before booking.

What boiler brands do you install?

We install Vaillant, Glow-worm, and Baxi boilers, chosen for reliability and efficiency, backed by manufacturer guarantees of up to 12 years.

How long does a boiler installation take?

We install boilers in a single day. We arrive when we say we will, work cleanly, and leave your home exactly as we found it — just with a far better boiler in place.

Are your engineers Gas Safe registered?

Yes. All our engineers are Gas Safe registered. Our registration number is 575142, which you can verify directly on the Gas Safe Register before we visit.

What guarantee comes with a new boiler?

We install Vaillant, Glow-worm, and Baxi boilers with manufacturer guarantees of up to 12 years, giving you long-term peace of mind.

Can I spread the cost of a new boiler?

Yes. We offer flexible finance options so you can spread the cost across manageable monthly payments and choose the right boiler for your home without compromise.

What areas do you cover?

We cover East Sussex, West Sussex, and Surrey — including Eastbourne, Brighton, Hastings, Lewes, Bexhill-on-Sea, Crowborough, Royal Tunbridge Wells, Uckfield, Hailsham, Seaford, Rye, and surrounding areas. Not sure? Just call us.

Do you offer landlord gas safety certificates?

Yes. We carry out annual landlord gas safety checks and issue CP12 certificates across Sussex and Surrey, often on the same day.

AREAS WE COVER

Local to You Across Sussex and Surrey

Our engineers are based locally and cover the full breadth of East and West Sussex, as well as Surrey.

Eastbourne | Brighton | Hastings | Lewes | Bexhill-on-Sea | Crowborough | Uckfield | Royal Tunbridge Wells | Heathfield | Hailsham | Seaford | Polegate | Battle | Rye | Wadhurst

Not on the list? Call us, we will most likely cover you.

Surrey & Sussex
01903 802395
info@on-demand-group.co.uk

Get Your Free Quote

Planning ahead or already without heating — we’re ready.

Gas Safe engineers across East Sussex. Same and next-day appointments available. Up to a 12-year guarantee on every installation. And a free quote with zero obligation.

Call us now01903 802395

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Complete the form below for a same-day response

Gas Safe Registered
Up to 12-Year Guarantee
1,000+ Boilers Installed
36+ Years Experience

30+

GOOGLE REVIEWS

1,000+

NEW BOILERS INSTALLED

36+

YEARS EXPERIENCE

Coventry Plumbing Ltd is an Introducer Appointed Representative (Financial Services Register No. 1047433) of Phoenix Financial Consultants Limited (Phoenix). Phoenix is a credit broker, not a lender. Phoenix is authorised and regulated by the Financial Conduct Authority (FRN: 539195), and offers finance from its panel of lenders. All finance subject to status and credit checks.